Summary

Undulatory swimming in fish is powered by the segmental body musculature of the myotomes. Power generated by this muscle and the interactions between the fish and the water generate a backward-travelling wave of lateral displacement of the body and caudal fin. The body and tail push against the water, generating forward thrust. The muscle activation and strain patterns that underlie body bending and thrust generation have been described for a number of species and show considerable variation. This suggests that muscle function may also vary among species. This variation must be due in large part to the complex interactions between muscle mechanical properties, fish body form, swimming mode, swimming speed and phylogenetic relationships. Recent work in several laboratories has been directed at studying patterns of muscle power output in vitro under simulated swimming conditions. This work suggests that the way that fish generate muscle power and convert it into thrust through the body and caudal fin does indeed vary. However, despite the differences, several features appear to be common to virtually all species studied and suggest where future effort should be directed if muscle function in swimming fish is to be better understood.

Similar articles

Other journals from The Company of Biologists

Many organizations that use sonar for underwater exploration gradually increase the volume of the noise to avoid startling whales and dolphins, but a new Research Article from Paul Wensveen and colleagues reveals that some humpback whales do not take advantage of the gradual warning to steer clear.

Many animals stabilize their vision by swivelling their eyes to prevent the image from smearing as they move. A new Research Article on tadpoles from Céline Gravot and colleagues shows that contrast between objects in their view affects the strength of this visual reflex, suggesting that the eye may be processing the image at a basic level to produce the reflex.

When starting her own lab at James Cook University, Australia, Jodie Rummer applied for a Travelling Fellowship from JEB to gather data on oxygen consumption rates of coral reef fishes at the Northern Great Barrier Reef. A few years later, Björn Illing, from the Institute for Hydrobiology and Fisheries Science, Germany, followed in Jodie’s footsteps and used a JEB Travelling Fellowship to visit Jodie’s lab. There, he studied the effects of temperature on the survival of larval cinnamon clownfish. Jodie and Björn’s collaboration was so successful that they have written a collaborative paper, and Björn has now returned to continue his research as a post-doc in Jodie’s Lab. Read their story here.

Where could your research take you? The deadline to apply for the current round of Travelling Fellowships is 30 Nov 2017. Apply now!